Mortar mixer



FIG. 1 is a perspective partly front elevational and partly side elevational view of a mortar mixer showing the new design;

FIG. 2 is a side elevational view of the mortar mixer;

FIG. 3 is another side elevational view of the mortar mixer;

FIG. 4 is a rear elevational view of the mortar mixer;

FIG. 5 is a front elevational view of the mortar mixer;

FIG. 6 is a top plan view of the mortar mixer; and

FIG. 7 is a bottom plan view of the mortar mixer. 

The ornamental design of a mortar mixer, substantially as shown. 